BOISE, Idaho — The walls of the Old Idaho Penitentiary no longer holds any prisoners, but they do hold stories, and some of the most interesting stories aren’t about the prisoners at all. This ...

BOISE, Idaho — The Old Idaho Penitentiary in Boise was first built as the territorial prison in 1872 but it wasn't until 1952 when one of the prison's most well-known residents arrived - Dennis the ...

Spend a Sunday afternoon at the Old Idaho Penitentiary to celebrate the 69th birthday of Dennis the Cat on May 30. The prison’s historic cat lived on site for 16 years. Idaho State Historical Society ...

The Old Idaho Penitentiary is throwing a birthday celebration that is going to be the cat’s meow. According to a press release, Dennis the Cat Day will celebrate the infamous cat’s 70th birthday party ...